Incremental compilation of removed fields.

dart/tests/try/web/incremental_compilation_update_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library trydart.incremental_compilation_update_test;
 
 import 'dart:html';
 
 import 'dart:async' show
     Future;
@@ skipping 978 matching lines @@
   }
   try {
     print(instance.x);
   } catch (e) {
     print('getter threw');
   }
 }
 """,
             const <String>['v2']),
     ],
+
+    // Test removing a field from a class works.
+    // TODO(ahe): The emitter still see the field, and we need to ensure that
+    // old names aren't used again.
+    const <ProgramResult>[
+        const ProgramResult(
+            r"""
+class A {
+  var x;
+}
+
+var instance;
+
+main() {
+  if (instance == null) {
+    instance = new A();
+  }
+  try {
+    instance.x = 'v1';
+  } catch(e) {
+    print('setter threw');
+  }
+  try {
+    print(instance.x);
+  } catch (e) {
+    print('getter threw');
+  }
+}
+""",
+            const <String>['v1']),
+        const ProgramResult(
+            r"""
+class A {
+}
+
+var instance;
+
+main() {
+  if (instance == null) {
+    instance = new A();
+  }
+  try {
+    instance.x = 'v1';
+  } catch(e) {
+    print('setter threw');
+  }
+  try {
+    print(instance.x);
+  } catch (e) {
+    print('getter threw');
+  }
+}
+""",
+            const <String>['setter threw', 'getter threw']),
+    ],
 ];
 
 void main() {
   listener.start();
 
   document.head.append(lineNumberStyle());
 
   return asyncTest(() => Future.forEach(tests, compileAndRun));
 }
 
 int testCount = 1;
 
 Future compileAndRun(List<ProgramResult> programs) {
   var status = new DivElement();
   document.body.append(status);
 
   IFrameElement iframe =
       appendIFrame(
           '/root_dart/tests/try/web/incremental_compilation_update.html',
           document.body)
           ..style.width = '100%'
           ..style.height = '600px';
 
   return listener.expect('iframe-ready').then((_) {
     ProgramResult program = programs.first;
 
-
     status.append(
         new HeadingElement.h2()
             ..appendText("Full program #${testCount++}:"));
     status.append(numberedLines(program.code));
 
     status.style.color = 'orange';
     WebCompilerTestCase test = new WebCompilerTestCase(program.code);
     return test.run().then((String jsCode) {
       status.style.color = 'red';
       var objectUrl =
@@ skipping 83 matching lines @@
   position: absolute;
   left: 0px;
   width: 3em;
   text-align: right;
   background-color: lightgoldenrodyellow;
 }
 ''');
   style.type = 'text/css';
   return style;
 }